Portion of a shoe outsole



FIG. 1 is a first perspective view of a portion of a shoe outsole showing my new design;

FIG. 2 is a second perspective view thereof; and,

FIG. 3 is a plan view thereof.

The uneven broken lines immediately adjacent to the shaded areas represent unclaimed boundaries of the design. The uneven broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design.

The unshaded surfaces between the grooves of the design form no part of the claim. 

The ornamental design for a portion of a shoe outsole, as shown and described. 